<template> <!-- vue实例外创建 -->
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div class="logo">
                <img src="../assets/001.png" alt="">
                <span>电商后台管理</span>
            </div>
            <el-button type="info" @click="layout">退出</el-button>
        </el-header>
        <el-container>
        <!--侧边栏-->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
            <!--侧边栏菜单区域-->
                <el-menu
                    :default-active="activePath"
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#409eff"
                    unique-opened
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    router>
                    <!--一级菜单-->
                    <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                        <!--一级菜单模板区域-->
                        <template slot="title">
                            <!--一级菜单图标-->
                            <i :class="iconsObj[item.id]"></i>
                            <!--一级菜单文本-->
                            <span>{{item.authName}}</span>
                        </template> 
                        <!--二级菜单-->
                        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                            <!--二级菜单模板区域-->
                            <template slot="title">
                                <!--二级菜单图标-->
                                <i class="el-icon-location"></i>
                                <!--二级菜单文本-->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-container>
                <!-- 右侧内容主体 -->
                <el-main>
                    <!-- 路由占位符 -->
                    <router-view></router-view>
                </el-main>
            </el-container>
        </el-container>
    </el-container>
</template>

<script>
export default{
        data(){
            return{
                //左侧菜单数据
                menuList:[],
                //定义图标
                iconsObj:{
                    '125':'iconfont icon-user',
                    '103':'iconfont icon-tijikongjian',
                    '101':'iconfont icon-shangpin',
                    '102':'iconfont icon-danju',
                    '145':'iconfont icon-baobiao'
                },
                //是否折叠
                isCollapse:false,
                //被激活的链接地址
                activePath:''
            }
        },
        created(){
            this.getMenuList()
            this.activePath=window.sessionStorage.getItem('activePath')
        },
    methods:{
            //推出
            layout(){
            //清除token
            window.sessionStorage.clear()
            //编程时导航回到登录页面
            this.$router.push("/login")
        },
        //获取所有菜单数据
        async getMenuList(){
            const {data:res}=await this.$http.get('/menus')
            if(res.meta.status!==200)return this.$message.error(res.meta.msg)
            this.menuList=res.data
            console.log(this.menuList);
        },
        //点击按钮，切换菜单的折叠与展开
        toggleCollapse(){
            this.isCollapse=!this.isCollapse
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
        }
    }
}
</script>

<style scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373b41;
    display: flex;
    justify-content: space-between;
    color: #fff;
    align-items: center;
    padding-left: 0;
    font-size: 20px;
}
.el-header div{
    display: flex;
    align-items: center;
}
.el-header div span{
    margin-left: 20px;
}
.el-header img{
    width: 60px;
    height: 60px;
    border-radius: 50%;
}
.el-aside{
    background-color: #333744;
    
}
.el-menu{
        border-right: none;
    }
.el-main{
    background-color: #eaedf1;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>